CN1622153A - Driving method of plasma display panel and plasma display device - Google Patents

Abstract

In an address driving circuit including a power recovery circuit, an energy charged in an external capacitor is established to be greater than an energy discharged from the external capacitor. As a result, a voltage of the external capacitor is increased to an address voltage to automatically stop a power recovery operation in a pattern having few switching variations. Further, the voltage of the external capacitor reaches an equilibrium state between half the address voltage and the address voltage to perform the power recovery operation in a pattern having many switching variations. In addition, the controller can stop the power recovery operation in a pattern having few switching variations such as the full white pattern.

Description

The driving method of plasma display panel and plasma display panel device

Technical field

The present invention relates to a kind of driving method and plasma display panel device of plasma display panel.More specifically, the present invention relates to a kind of address driving circuit that is used to apply address voltage.

Background technology

PDP is to use the plasma that produces by process gas discharge to come the flat-panel monitor of character display or image, and depends on its size, and the form with matrix provides tens of to millions of pixels thereon.According to driving voltage waveform that is provided and discharge cell structure, PDP is categorized as DC PDP and AC PDP.

DC PDP has the electrode that is exposed in the discharge space, and it allows electric current to flow into discharge space when voltage is provided.Therefore, debatable is that it need be used for the resistor of electric current restriction.On the other hand, AC PDP has the electrode that is covered by dielectric layer, and is formed naturally electric capacity with the restriction electric current.In addition, in AC PDP, avoid ionic bombardment in the interdischarge interval guard electrode.Therefore, AC PDP has the life-span longer than DC PDP.

Fig. 1 shows the skeleton view of AC PDP.

Go out as shown, the scan electrode 4 that is arranged on dielectric layer 2 and the diaphragm 3 is provided abreast and has kept electrode 5, and formation is right mutually below first glass substrate 1.The a plurality of address electrodes 8 that cover with insulation course 7 are installed on second glass substrate 6.On the insulation course between the address electrode 87, form barrier walls (barrier rib) 9 abreast with address electrode 8, and on the surface of the insulation course between the barrier walls 97, form fluorophor 10.First and second glass substrates 1 and 6 are provided, have discharge space 11 between it, they face with each other, and make that scan electrode 4 and maintenance electrode 5 can be respectively across address electrodes 8.Address electrode 8 forms discharge cells 12 with the discharge space 11 that forms at scan electrode 4 and the cross section that keeps electrode 5.

Fig. 2 shows PDP electrode spread figure.

Go out as shown, the PDP electrode has m * n matrix structure, and in detail, it has address electrode A on the direction of row ₁To A _m, and alternately have scan electrode Y on the direction of being expert at ₁To Y _nWith maintenance electrode X ₁To X _nDischarge cell 12 shown in Fig. 2 is corresponding to the discharge cell shown in Fig. 1 12.

Usually, the method that is used to drive AC PDP comprises reset cycle, addressing period and hold period.

In reset cycle, the state of each unit of resetting is with the address of determining unit successfully.In addressing period, with the unit that is switched on with the unit of not conducting, and in the unit that will be switched on (that is selected cell), gather wall (wall) electric charge in the option board.In hold period, discharge unit that is addressed with conducting and display frame practically.

Because scan electrode and keep the electric discharge between electrodes space, with and on formed the surface of address electrode with the surface that has formed scanning and maintenance electrode on it between discharge space, each is all worked as capacity load (hereinafter referred to as the plate capacitor), therefore has electric capacity onboard.Thereby, except the power that is used for addressing, also need reactive power to apply the waveform that is used for addressing.Therefore, the address driving circuit of PDP comprises Power Recovery circuit (power recovery circuit), be used to reclaim reactive power and with its repeated use, as disclosed the same by L.F.Weber in No. 5081400 from the Power Recovery circuit No. the 4866349th, United States Patent (USP).

When demonstration needed the image of high power consumption, traditional Power Recovery circuit can be with power-consumption limitations in intended level.Yet when demonstration needed the image of low power consumption, traditional Power Recovery circuit was also worked.As a result, the power consumption of traditional Power Recovery circuit is than the power consumption height of the circuit of regenerative power not when showing the image that only needs low power consumption.For example, all in the display pattern of conducting, addressing voltage is applied on the address electrode continuously at all discharge cells.Therefore, in this display pattern, do not need to carry out the Power Recovery operation.Yet because the conventional power recovery circuit carries out Power Recovery in this display pattern, power consumption is than essential height.

Because the handoff loss of the parasitic element of resistor or circuit, so during the Power Recovery process, traditional Power Recovery circuit can not reclaim 100% reactive power.Thereby the Power Recovery operation can not be adjusted to desirable voltage with the voltage of plate capacitor.Therefore, switch carries out difficult switching.

Summary of the invention

The invention provides the address driving circuit that is used to reduce power consumption.

The invention provides the switching that is used for according to addressing circuit and change the address driving circuit that changes the Power Recovery operation.

In one aspect of the invention, plasma display panel device comprises: plate, second electrode that it second direction that comprises that a plurality of first electrodes that extend along first direction and a plurality of edge and first direction intersect is extended; First driving circuit, it is applied to first voltages in sequence on first electrode; Select circuit, it is couple to second electrode, is used for will being applied in from the selection of second electrode second electrode of second voltage; Second driving circuit, it comprises that at least one has inductor that is couple to first end of selecting circuit and the capacitor that is couple to second end of this inductor, is used for second voltage is applied to by second electrode of selecting circuit to select; And controller, it selects the mode of operation of second driving circuit in response to vision signal.When mode of operation is first pattern, after giving the capacity load charging that forms by first electrode and selected second electrode by capacitor and inductor, second driving circuit is applied to second voltage on selected second electrode, and make the discharge of this capacity load by capacitor and inductor, thereby reduce the voltage of selected second electrode, and reduce capacity load discharge residual voltage afterwards by the operation of selecting circuit.When mode of operation was second pattern, second driving circuit was applied directly to second voltage on selected second electrode.

In an example embodiment, when at least one height field (subfield), the number of first discharge cell is greater than predetermined value the time, and it is first pattern that controller is selected mode of operation.The on/off state of first discharge cell is with different adjacent to the on/off state of the discharge cell of first discharge cell along first direction.

In another example embodiment, when at least one height field, the number of the number of first discharge cell and second discharge cell and during greater than predetermined value, it is first pattern that controller is selected mode of operation.The on/off state of first discharge cell is different with the on/off state along the neighboring discharge cells of first direction, and the on/off state of second discharge cell is different with the on/off state along the neighboring discharge cells of second direction.

In an example embodiment again, in first pattern, second driving circuit offered capacitor with electric current before making the capacity load discharge.The electric current that offers capacitor can provide from the voltage source that second voltage is provided.

In another example embodiment, in first pattern, second driving circuit is worked in the following order: the period 1, during this cycle, make the capacity load charging by the voltage that is filled in inductor and the capacitor; Second round, during this cycle, by the voltage source of second voltage is provided, second electrode of selected capacity load is maintained second voltage basically; Period 3, during this cycle, electric current is offered inductor and capacitor by the working voltage source; And the period 4, during this cycle, make the capacity load discharge by using the voltage and the inductor that in capacitor, are filled.

In another example embodiment, second driving circuit also comprises: first switch and second switch, and its coupled in parallel is between second end of inductor and the capacitor or first end of inductor and selecting between the circuit; And the 3rd switch, it is coupled in the voltage source that second voltage is provided and selects between the circuit.First switch, second switch and the 3rd switch can be respectively the transistors that comprises body diode, and second driving circuit can also comprise: first diode, and it is in the path that is formed by capacitor, first switch and inductor, form at the reverse direction of the body diode of first switch; And second diode, it is in the path that is formed by capacitor, second switch and inductor, form at the reverse direction of the body diode of second switch.

In another example embodiment, in first pattern, second driving circuit is worked in the following order: the period 1, and during this cycle, first switch conduction; Second round, during this cycle, the 3rd switch conduction; Period 3, during this cycle, second switch and the 3rd switch conduction; And the period 4, during this cycle, the second switch conducting.In addition, in second pattern, first switch conduction, and second switch and the 3rd switch turn-off.

An example embodiment comprises first inductor and second inductor again, and second driving circuit comes to capacity load charging by first inductor, and makes the capacity load discharge by second inductor.

In an example embodiment again, make the inductor on the path of capacity load charging identical with inductor on the path that capacity load is discharged.

In another example embodiment, select circuit to comprise a plurality of first switches between first end that is coupled in second electrode and inductor respectively, and be coupled in second electrode respectively and be used to provide a plurality of second switches between the voltage source of tertiary voltage.With the discharge cell that is switched on can be by being couple to conducting second electrode of first switch and first electrode that has been applied in first voltage select.When first voltage is applied on first electrode in turn, when selecting the continuous conducting of first switch of circuit, second driving circuit can be with the second pattern work.

In another aspect of this invention, provide the driving method of a kind of PDP, on this PDP, formed a plurality of first electrodes and second electrode, and formed capacity load by first and second electrodes.This driving method comprises: select mode of operation in each height field according to vision signal; In first electrode, select to be applied in first electrode of first voltage; And second voltage is applied on non-selected first electrode.When mode of operation was first pattern, this driving method also comprised: by having first inductor of first end that is couple to first electrode, increase the voltage of selected first electrode; By first voltage source of first voltage is provided, the voltage of selected first electrode is maintained first voltage basically; When the voltage with selected first electrode maintains first voltage basically, electric current is offered second inductor with first end that is couple to first electrode; And the voltage that reduces selected first electrode by second inductor.When mode of operation was second pattern, this driving method also comprised first voltage is applied on selected first electrode by first voltage source.

In an example embodiment, in first pattern, when increasing and reducing the voltage of first electrode, capacitor is couple to second end of first inductor and second end of second inductor.

In another example embodiment, first and second inductors are identical.

In an example embodiment again, the first and second inductor differences.

In other example embodiment, tertiary voltage is applied on second electrode in turn.In addition, in first pattern, when tertiary voltage being applied on second electrode, repeat following steps:, increase the voltage of selected first electrode by having first inductor of first end that is couple to first electrode at every turn; By first voltage source of first voltage is provided, the voltage of selected first electrode is maintained first voltage basically; When the voltage with selected first electrode maintains first voltage basically, electric current is offered second inductor that is couple to first electrode; And, reduce the voltage of selected first electrode by second inductor.In addition, change the voltage of capacitor according to the combination of first electrode of first electrode of previous selection and current selection.

Of the present invention more on the one hand, plasma display panel device comprises: plate, second electrode that it second direction that comprises that a plurality of first electrodes that extend along first direction and a plurality of edge and first direction intersect is extended; First driving circuit, it is applied to first voltages in sequence on first electrode; Select circuit, it is couple to second electrode, is used for will being applied in the selection of second electrode second electrode of data; And second driving circuit, it comprises that at least one is couple to the capacitor of selecting the circuit inductance device and being couple to this inductor.Second driving circuit electrically intersects between inductor and capacitor, and, second voltage is applied to by on second electrode of selecting circuit to select when the summation of the predetermined number of the discharge cell of the data difference between two discharge cells adjacent during less than predetermined value along second direction.Second driving circuit is by using inductor and capacitor, make the capacity load charging and the discharge that form by second electrode of selecting circuit to select and first electrode, and when described summation during greater than predetermined value to the capacity load charging after, second voltage is applied on selected second electrode.

In another aspect of this invention, plasma display panel device comprises: plate, the address electrode that it second direction that comprises that a plurality of scan electrodes that extend along first direction and a plurality of edge and first direction intersect is extended; First driving circuit, it is applied to first voltages in sequence on the scan electrode; Select circuit, it is couple to address electrode, is used for will being applied in the address electrode selection address electrode of data; Second driving circuit, it is couple to the address electrode by selecting circuit to select; And controller, it selects the mode of operation of second driving circuit in response to vision signal.Second driving circuit comprises: at least one has the inductor of first end that is couple to address electrode; Be coupled in voltage source that address voltage is provided and first switch between the address electrode; Be couple to the capacitor of second end of inductor; And at least one be coupled in inductor second end and and capacitor between or the second switch between inductor and the selection circuit.When mode of operation was first pattern, second driving circuit was operated the voltage that increases and reduce address electrode by the on/off of second switch, and the residual voltage of the operation by selecting circuit after with the voltage of address electrode is reduced to predetermined voltage.When mode of operation was second pattern, second driving circuit electrically intersected between capacitor and inductor by turn-offing second switch.

Of the present invention more on the one hand, plasma display panel device comprises: plate, second electrode that it second direction that comprises that a plurality of first electrodes that extend along first direction and a plurality of edge and first direction intersect is extended; First driving circuit, it is applied to first voltages in sequence on first electrode; Select circuit, it is couple to second electrode, is used for will being applied in the selection of second electrode second electrode of data; And second driving circuit, it comprises that at least one is couple to the capacitor of selecting the circuit inductance device and being couple to this inductor.In first mode of operation, inductor and capacitor electrode gas phase are handed over, and in second mode of operation, according to display pattern, the voltage of capacitor is variable.

Of the present invention more on the one hand, plasma display panel device comprises: plate, second electrode that it second direction that comprises that a plurality of first electrodes that extend along first direction and a plurality of edge and first direction intersect is extended; First driving circuit, it is applied to first voltages in sequence on first electrode; Select circuit, it is couple to second electrode, is used for will being applied in the selection of second electrode second electrode of data; And second driving circuit, it comprises that at least one is couple to the capacitor of selecting the circuit inductance device and being couple to this inductor.In first mode of operation, do not produce the resonance between inductor and the capacitor.In second pattern, produce the resonance between inductor and the capacitor, and according to display pattern, the voltage of capacitor is variable.

Description of drawings

Fig. 1 shows the fragmentary, perspective view of AC PDP.

Fig. 2 shows PDP electrode spread figure.

Fig. 3 shows the figure according to the plasma display panel device of example embodiment of the present invention.

Fig. 4 shows the address driving circuit according to first example embodiment of the present invention.

Fig. 5 shows the reduced graph of the address driving circuit of Fig. 4.

Fig. 6 shows a figure of on/off pattern (pattern).

Fig. 7 shows the figure of line on/off pattern.

Fig. 8 shows the figure of complete white pattern.

Fig. 9 shows the sequential chart of the Power Recovery circuit that is used for display dot on/off pattern of Fig. 5.

Figure 10 A to 10H shows the timing in accordance with Fig. 9, for the current path of each pattern of the address driving circuit of Fig. 5.

Figure 11 shows and is used to show the full sequential chart of the Power Recovery circuit of Fig. 5 of pattern in vain.

Figure 12 A to 12D shows the timing in accordance with Figure 11, for the current path of each pattern of the address driving circuit of Fig. 5.

Figure 13 shows the address driving circuit according to second example embodiment of the present invention.

Figure 14 shows according to the power consumption in the address driving circuit of first example embodiment of the present invention.

Figure 15 shows the controller according to the 3rd example embodiment plasma display panel device of the present invention.

Figure 16 shows the power consumption according to the driving circuit of the 3rd example embodiment of the present invention.

Embodiment

In the following detailed description, simply by diagram, and only illustrate and described example embodiment of the present invention by the optimal mode of finishing the present inventor's design.As will realizing, the present invention can all do not break away from of the present invention various tangible aspect correct.Therefore, accompanying drawing and description will be regarded as being actually illustrative, and nonrestrictive.

The driving method of plasma display panel device and PDP will be described in detail with reference to the attached drawings.

Fig. 3 shows the sketch according to the plasma display panel device of example embodiment of the present invention.

As shown in Figure 3, plasma display panel device comprises PDP 100, address driver 200, scanning and maintenance driver 300 and controller 400.In Fig. 3, scanning and maintenance driver 300 are illustrated as single, but can be divided into scanner driver usually and keep driver.

PDP 100 comprises a plurality of address electrode A that extend along the direction of row ₁To A _m, and a plurality of scan electrode Y of the direction that follows in couples extension ₁To Y _nWith a plurality of maintenance electrode X ₁To X _nAddress driver 200 slave controllers 400 receiver address drive control signal, and address signal is applied to each address electrode A that is used to select the discharge cell that will be shown ₁To A _mOn.Scanning and maintenance driver 300 slave controllers 400 receive the retentive control signals, and will keep pulse alternately to be input to scan electrode Y ₁To Y _nWith maintenance electrode X ₁To X _n, to keep selected discharge cell.Controller 400 receives outer video signal, produces address drive control signal and retentive control signal, and they are applied to address driver 200 and scanning and keep driver 300.

Usually, single frame is divided into a plurality of sons field, driven element field in PDP, and the discharge cell that selection will be discharged from discharge cell.In order to select discharge cell, scanning voltage is applied on the scan electrode in turn, and in addressing period, setovers and do not apply the scan electrode of scanning voltage with positive voltage.The voltage (hereinafter referred to as addressing voltage) that will be used for addressing is applied to the address electrode of the such discharge cell of process: this discharge cell will be selected from a plurality of discharge cells that formed by the scan electrode that has been applied in scanning voltage, and reference voltage is applied on the non-selected address electrode.Usually, address voltage uses positive voltage, and scanning voltage uses ground wire voltage or negative voltage, makes to produce discharge at the address electrode that has applied address voltage with the scan electrode place that has applied scanning voltage, and selects corresponding discharge cell.Ground wire voltage is continually as reference voltage.

Be applied on the scan electrode by the hypothesis scanning voltage, and reference voltage is applied on the address electrode as ground wire voltage, with the address driving circuit that is described with reference to Figure 4 in the address driver 200.

Fig. 4 shows the address driving circuit according to first example embodiment of the present invention.

As shown in Figure 4, address driving circuit comprises Power Recovery circuit 210 and a plurality of addressing circuit 220 ₁To 220 _mAddressing circuit 220 ₁To 220 _mBe connected respectively to a plurality of address electrode A ₁To A _m, and each addressing circuit has two switch A _HAnd A _LCome respectively as driving switch and grounding switch.Switch A _HAnd A _LCan constitute by the switch of other type of the field effect transistor (FET) with body diode (body diode) or execution and the same or similar function of FET.In Fig. 4, switch A _HAnd A _LEach comprise N-channel MOS FET.Switch A _HFirst end (drain electrode) be connected to Power Recovery circuit 210, and switch A _HSecond end (source electrode) be connected to address electrode A ₁To A _m, and as switch A _HDuring conducting, the address voltage V that will provide by Power Recovery circuit 210 _aBe sent to address electrode A ₁To A _mSwitch A _LHas the address electrode of being connected to A ₁To A _mFirst end (drain electrode) and be connected to second end (source electrode) of reference voltage (ground wire voltage), and as switch A _LDuring conducting, ground wire voltage is sent to address electrode A ₁To A _mIn addition, switch A _HAnd A _LNot conducting simultaneously.

When being connected respectively to address electrode A ₁To A _mAddressing circuit 220 ₁To 220 _mSwitch _HAnd A _LDuring by above-mentioned control signal conducting or shutoff, address voltage V _aOr ground wire voltage is applied to address electrode A ₁To A _mOn.In addressing period, select as switch A _HBe applied in address voltage V during conducting _aAddress electrode, and portion is selected as switch A _LBe applied in the address electrode of ground wire voltage during conducting.

Power Recovery circuit 210 comprises switch A _a, A _rAnd A _f, inductor L ₁And L ₂, diode D ₁And D ₂, and capacitor C ₁And C ₂Switch A _a, A _rAnd A _fCan be respectively constitute by the switch of other type of the FET with body diode or execution and the same or similar function of FET.In Fig. 4, switch A _a, A _rAnd A _fEach constitute by N-channel MOS FET.Switch A _aFirst end (drain electrode) be connected to and be used to provide address voltage V _aVoltage source on, and switch A _aSecond end (source electrode) be connected to addressing circuit 220 ₁To 220 _mSwitch A _HFirst end.Capacitor C ₁And C ₂Be connected on and be used to provide address voltage V _aVoltage source and ground wire voltage between.Addressing circuit 220 ₁To 220 _mSwitch A _HFirst end be connected to inductor L ₁And L ₂First end.Switch A _rWith diode D ₁Be connected on capacitor C ₁And C ₂Common node and inductor L ₁Second end between.Diode D ₂With switch A _rBe connected on inductor L ₂Second end and capacitor C ₁And C ₂Common node between.

Can change inductor L ₁, diode D ₁With switch A _rThe order of connection, and can change inductor L ₂, diode D ₂With switch A _fThe order of connection.Diode D ₁And D ₂Preventing may be by each switch A _rAnd A _fThe current path that the body diode at place causes, and if do not have body diode to exist, then can remove diode D ₁And D ₂Catching diode D ₃Can be connected inductor L ₁Second end be used to provide address voltage V _aVoltage source between, make in the operating period of Power Recovery circuit 210, be applied to address electrode A ₁To A _mOn voltage can not surpass address voltage V _aEqually, catching diode D ₄Can be connected ground wire voltage and inductor L ₂Second end between, make to be applied to address electrode A ₁To A _mOn voltage can be less than ground wire voltage.

In Fig. 4, single Power Recovery circuit 210 is illustrated as is connected to addressing circuit 220 ₁To 220 _mIn addition, addressing circuit 220 ₁To 220 _mCan be divided into a plurality of groups, Power Recovery circuit 210 is connected to each group.In Fig. 4, capacitor C ₁And C ₂Be connected on and be used to provide address voltage V _aVoltage source and ground wire voltage between, and can remove capacitor C ₁

With reference to figure 5 to 12D, with the operation of describing according to the address driving circuit of first example embodiment of the present invention.Because the threshold voltage of semiconductor element (switch or diode) is well below sparking voltage, so this threshold voltage is assumed to be 0V.

Fig. 5 shows the sketch of the address driving circuit of Fig. 4.For describing for simplicity, only illustrate two adjacent addressing circuits 220 _2i-1With 220 _2iTo be illustrated as the plate capacitor by the capacitive part that address electrode and scan electrode form, and ground wire voltage will be applied to the scan electrode part of plate capacitor.

As shown in Figure 5, Power Recovery circuit 210 is by addressing circuit 220 _2i-1With 220 _2iSwitch A _H1And A _H2Be connected to plate capacitor C _P1And C _P2, and addressing circuit 220 _2i-1With 220 _2iSwitch A _L1And A _L2Be connected to ground wire voltage.Plate capacitor C _P1Be by address electrode A _2i-1With the capacitive part of scan electrode formation, and plate capacitor C _P2Be by address electrode A _2iCapacitive part with scan electrode formation.

To the operation of address driving circuit be described by using the representative pattern that is presented at the Fig. 6 to 8 on the screen in the single son field.Represent pattern to comprise and have a lot of addressing circuits 220 ₁To 220 _mSwitching the point on/off pattern and the line on/off pattern that change and have less addressing circuit 220 ₁To 220 _mThe complete white pattern that changes of switching.

Fig. 6 to 8 shows the concept map of an on/off pattern, line on/off pattern and complete white pattern respectively.

These patterns are by addressing circuit 220 ₁To 220 _mBlocked operation determine; In any situation that realizes these patterns, the switch A of Power Recovery circuit 210 _a, A _rAnd A _fTiming identical.When selecting scan electrode in turn, select the switch A of circuit in the repeat to address (RA) _HAnd A _LTurn-on and turn-off when operation, the switching that produces addressing circuit changes.

With reference to figure 6, some on/off pattern is when selecting scan electrode in turn, the display pattern that produces when address voltage alternately is applied on the odd and even number address electrode.For example, when selecting the first scan electrode Y ₁The time, address voltage is applied to the odd address electrode A ₁And A ₃On, to select the odd column of first row, select the second scan electrode Y and work as ₂The time, address voltage is applied to the even address electrode A ₂And A ₄On, with the emission in the even column that is chosen in second row.In order to realize this addressing, when selecting scan electrode Y ₁The time, odd address is selected the switch A of circuit _HConducting, and even address is selected the switch A of circuit _LConducting, and when selecting scan electrode Y ₂The time, even address is selected the switch A of circuit _HConducting, and odd address is selected the switch A of circuit _LConducting.

With reference to figure 7, line on/off pattern is such pattern: wherein when selecting the first scan electrode Y ₁The time, address voltage is applied to all address electrode A ₁To A ₄On, and when selecting the second scan electrode Y ₂The time, ground wire voltage is applied to address electrode A ₁To A ₄On.In order to realize this addressing, when selecting scan electrode Y ₁The time, the switch A of all addressing circuits _HConducting, and when selecting scan electrode Y ₂The time, the switch A of all addressing circuits _LConducting.

With reference to figure 8, complete white pattern is when selecting scan electrode in turn, the display pattern that produces when address voltage is applied on all address electrodes continuously.That is to say the switch A of all addressing circuits _HConducting always.

In an on/off pattern and line on/off pattern, the switch A of addressing circuit _LPeriodically conducting, but not conducting in complete white pattern.Switch A _LConducting state determine capacitor C in the Power Recovery circuit of Fig. 5 ₂The voltage at place.

Because for switch A _LPeriodically conducting, some on/off pattern carries out similar function with line on/off pattern, therefore will put the operation that on/off pattern and complete white pattern are described the address driving circuit of Fig. 5 in detail by illustration.

1. put on/off pattern (with reference to figure 9 and 10A to 10H)

At first, will be described in the situation of on/off pattern, be used to show tool addressing circuit 220 with reference to figure 9 and 10A to 10H ₁To 220 _mThe time operation of address driving circuit of the pattern that changes of a lot of switchings.This operation variation has 8 kinds of ordered modes, and comes the change pattern by master cock.Resonance phenomena occurs, but it is not continuous oscillation.On the contrary, it is at switch A _rAnd A _fDuring conducting, by inductor L ₁Or L ₂With plate capacitor C _P1Or C _P2The voltage and current that causes of combination change.

Fig. 9 shows the sequential chart of the Power Recovery circuit of the Fig. 5 that is used for display dot on/off pattern, and Figure 10 A to 10H shows the timing in accordance with Fig. 9, for the current path of each pattern of the address driving circuit of Fig. 5.

In the circuit of Fig. 5, in the situation of display dot on/off pattern, when selecting single scan electrode, be connected to the odd address electrode A _2i-1Addressing circuit 220 _2i-1Switch A _H1, and be connected to the even address electrode A _2iAddressing circuit 220 _2iSwitch A _L2Conducting, and addressing circuit 220 _2iSwitch A _H2With addressing circuit 220 _2i-1Switch A _L1Turn-off.When selecting next scan electrode, switch A _H1And A _L2Turn-off and switch A _H2And A _L1Conducting.Repeat these operations.When display dot on/off pattern as mentioned above, by synchronous with the scanning voltage that is applied in turn on the scan electrode, addressing circuit 220 _2i-1With 220 _2iSwitch A _H1And A _H2And switch A _L1And A _L2Continuous turn-on and turn-off.

In Fig. 9, suppose before pattern 1 beginning switch A _H1, A _L2And A _aConducting and switch A _H2And A _L1Turn-off, make voltage V _aBe applied to plate capacitor C _P1On, and 0V voltage is applied to plate capacitor C _P2On.Like this, suppose voltage V _aBe applied to the odd address electrode A _2i-1On, and 0V voltage is applied to the even address electrode A _2iOn.

In pattern 1, as switch A _H1, A _L2And A _aConducting and switch A _H2And A _L1During shutoff, switch A _fConducting.Then, shown in Figure 10 A, electric current passes through voltage source V _a, switch A _a, inductor L ₂, diode D ₂, switch A _fAnd capacitor C ₂The path be injected into inductor L ₂With capacitor C ₂, and come to capacitor C with voltage ₂Charging.

In pattern 2, switch A _aTurn-off, shown in Figure 10 B, pass through plate capacitor C to form _P1, switch A _H1Body diode, inductor L ₂, diode D ₂, switch A _fAnd capacitor C ₂Resonant path.Reduce plate capacitor C by this resonant path _P1Voltage V _P1, and because switch A _L2So conducting is plate capacitor C _P2Voltage V _P2Maintain 0V.Slave plate capacitor C _P1The electric current (energy) of discharge is provided for capacitor C ₂, and come to capacitor C with voltage ₂Charging.

In mode 3, switch A _H1And A _L2Turn-off and switch A _H2And A _L1Conducting is to be applied to 0V voltage plate capacitor C _P1On.Switch A _fTurn-off and switch A _rConducting is passed through capacitor C to form shown in Figure 10 C ₂, switch A _r, diode D ₁, inductor L ₁, switch A _H2And plate capacitor C _P2Resonant path.By this resonant path from capacitor C ₂Provide electric current, to increase plate capacitor C _P2Voltage V _P2And make capacitor C ₂Discharge.In this example, because as plate capacitor C _P2Voltage V _P2Surpass voltage V _aThe time, switch A _aThe body diode conducting, so plate capacitor C _P2Voltage V _P2Be no more than voltage V _aAs plate capacitor C _P2Voltage reach voltage V _aThe time, by switch A _aBody diode and with inductor L ₁In remaining electric current be recovered to voltage source V _a

In pattern 4, switch A _aConducting and switch A _rTurn-off, with plate capacitor C _P2Voltage V _P2Maintain V _a, shown in Figure 10 D.

As mentioned above, during pattern 1 to 4, Power Recovery circuit 210 is by addressing circuit 220 _2iSwitch A _H2And with voltage V _aOffer address electrode A _2iBy addressing circuit 220 _2i-1Switch A _L1And with address electrode A _2i-1Maintain 0V.

In pattern 5 to 8, except the switching manipulation of addressing circuit, the switching manipulation of Power Recovery circuit is with above-mentioned identical.

In pattern 5, as switch A _H2, A _L1And A _aConducting and switch A _H1And A _L2During shutoff, switch A _fConducting.Therefore, electric current is by the voltage source V shown in Figure 10 E _a, switch A _a, inductor L ₂, diode D ₂, switch A _fAnd capacitor C ₂The path be injected into inductor L ₂With capacitor C ₂, and come to capacitor C with voltage ₂Charging.

In pattern 6, switch A _aTurn-off, shown in Figure 10 F, pass through plate capacitor C to form _P2, switch A _H2Body diode, inductor L ₂, diode D ₂, switch A _fAnd capacitor C ₂Resonant path.Reduce plate capacitor C by this resonant path _P2Voltage V _P2, and because switch A _L1So conducting is plate capacitor C _P1Voltage V _P1Maintain 0V.Slave plate capacitor C _P2The electric current (energy) of discharge is provided for capacitor C ₂, and come to capacitor C with voltage ₂Charging.

In mode 7, switch A _H2And A _L1Turn-off and switch A _H1And A _L2Turn-off, 0V voltage is applied to plate capacitor C _P2On.Switch A _fTurn-off and switch A _rConducting is passed through capacitor C to form shown in Figure 10 G ₂, switch A _r, diode D ₁, inductor L ₁, switch A _H2And plate capacitor C _P1Resonant path.By this resonant path from capacitor C ₂Provide electric current, to increase plate capacitor C _P1Voltage V _P1And make capacitor C ₂Discharge.Because as plate capacitor C _P1Voltage V _P1Surpass voltage V _aShi Kaiguan A _aThe body diode conducting, so plate capacitor C _P1Voltage V _P1Be no more than V _aAt plate capacitor C _P1Voltage reach V _aAfterwards, by switch A _aBody diode discharge (freewheel) inductor L ₁In remaining electric current.

In pattern 8, switch A _rTurn-off and switch A _aConducting is with plate capacitor C _P1Voltage V _P1Maintain V _a, shown in Figure 10 H.

During pattern 5 to 8 as described, Power Recovery circuit 210 is by addressing circuit 220 _2i-1Switch A _H1And with voltage V _aOffer address electrode A _2i-1By addressing circuit 220 _2iSwitch A _L2And with address electrode A _2iMaintain 0V.Operation by repeat pattern 1 to 8 realizes an on/off pattern.

When using voltage V _a/ 2 give capacitor C ₂Charging, and capacitor C ₂Electric capacity enough be used for voltage V to serve as greatly _a/ 2 offer capacitor C ₂Voltage source the time, utilize the LC resonance principle, can will use voltage V in pattern 2 or 6 _aThe plate capacitor C that is filled _P1Or C _P2Discharge into 0V, and can will discharge into the plate capacitor C of 0V in mode 3 or 7 _P1Or C _P2Be charged to voltage Va.

At first, in pattern 1, electric current (energy) is passed through inductor L from voltage source ₂Offer capacitor C ₂, and in pattern 2, make plate capacitor C _P1Discharge is to offer capacitor C with electric current (energy) ₂Like this, in pattern 1 and 2, give capacitor C with energy ₂Charging is with capacitor C ₂Voltage rise Δ V1.In mode 3, from capacitor C ₂By inductor L ₁Provide electric current, to increase plate capacitor C _P2Voltage, and aftercurrent is recovered to voltage source.Like this, from capacitor C ₂Release energy, with capacitor C ₂Voltage decrease Δ V2.Suppose using voltage V than stage morning _a/ 2 give capacitor C ₂Charging is then because giving capacitor C ₂Also in pattern 1, provide energy during charging, so capacitor C by voltage source ₂Rechargeable energy greater than capacitor C ₂Discharge energy.Therefore, Δ V1 is greater than Δ V2.In pattern 5 to 8, be charged to capacitor C ₂Rechargeable energy and from capacitor C ₂The discharge energy that discharges is corresponding to charging in the pattern 1 to 4 and discharge energy.Because plate capacitor C _P1Or C _P2Discharged, make its residual voltage reach 0V, and because in mode 3 or 7 once more with plate capacitor charging, so repeat pattern 1 to 8 o'clock, from capacitor C ₂Discharge, be used for to plate capacitor C _P1Or C _P2The energy of charging is constant basically.

Pattern 1 and 2 or pattern 5 and 6 in, as capacitor C ₂Rechargeable energy greater than its discharge energy, and capacitor C ₂When the voltage at place increases, reduce to be charged to capacitor C ₂Energy.Like this, when repeating the operation of pattern 1 to 8, capacitor C ₂Rechargeable energy reduce and capacitor C ₂Rechargeable energy and discharge energy thereof finally become identical, thereby reach equilibrium state.At capacitor C ₂In the voltage that filled greater than V _a/ 2 and less than V _a

In mode 3 and 7, as plate capacitor C ₂In the voltage that filled greater than V _a, can utilize resonance principle and at/2 o'clock at plate capacitor C _P1And C _P2In charge into and equal capacitor C ₂Voltage twice, therefore greater than V _aVoltage.Therefore, when in address driving circuit, providing parasitic element, plate capacitor C _P1And C _P2Voltage can utilize resonance principle and be elevated to voltage V _a, and switch A _aCan carry out the zero voltage switching operation.

2. complete white pattern (with reference to Figure 11 and 12A to 12D)

Will be with reference to Figure 11 and 12A to 12D, describe the time operation of such address driving circuit: it is used for showing to have the addressing circuit 220 that lacks than the situation of online on/off pattern ₁To 220 _mThe pattern that changes of switching.This operation has 4 kinds of ordered modes, and comes the change pattern by master cock.Resonance phenomena occurs, but is not continuous oscillation.On the contrary, it is at switch A _rAnd A _fDuring conducting, by inductor L ₁Or L ₂With plate capacitor C _P1Or C _P2The voltage and current that causes of combination change.

Figure 11 shows the sequential chart of the Power Recovery circuit of the Fig. 5 that is used to show complete white pattern, and Figure 12 A to 12D shows the timing in accordance with Figure 11, for the current path of each pattern of the address driving circuit of Fig. 5.

In the circuit of Fig. 5, show in the situation of complete white pattern, when selecting scan electrode in turn, addressing circuit 220 _2i-1With 220 _2iSwitch A _H1And A _H2Conducting always.

In Figure 11, suppose before pattern 1 beginning switch A _H1, A _H2And A _aConducting makes voltage V _aBe applied to plate capacitor C _P1And C _P2On.

In pattern 1, when switch AH1, AH2 and Aa conducting, switch Ar conducting.Shown in Figure 12 A, electric current is injected among inductor L2 and the capacitor C2 in the mode identical with the pattern 1 of Fig. 9, in order to giving capacitor C2 charging with voltage.

In pattern 2, switch A _aTurn-off, shown in Figure 12 B, pass through plate capacitor C to form _P1And C _P2, switch A _H1And A _H2Body diode, inductor L ₂, diode D ₂, switch A _fAnd capacitor C ₂Resonant path.Reduce plate capacitor C by this resonant path _P1And C _P2Voltage V _P1And V _P2, and with the pattern 2 of Fig. 9 in identical mode, come to capacitor C with voltage ₂Charging.

In mode 3, switch A _fTurn-off and switch A _rConducting is passed through capacitor C to form shown in Figure 12 C ₂, switch A _r, diode D ₁, inductor L ₁, switch A _H2And plate capacitor C _P1And C _P2Resonant path.Increase plate capacitor C by this resonant path _P1And C _P2Voltage V _P1And V _P2, and make capacitor C ₂Discharge.Because as voltage V _P1And V _P2Surpass V _aShi Kaiguan A _aThe body diode conducting, so plate capacitor C _P1And C _P2Voltage V _P1And V _P2Be no more than voltage V _a

In pattern 4, switch A _rTurn-off and switch A _aConducting is with plate capacitor C _P1And C _P2Voltage V _P1And V _P2Maintain V _a, shown in Figure 12 D.

During pattern 1 to 4, as described, Power Recovery circuit 210 is by addressing circuit 220 _2i-1With 220 _2iSwitch A _H1And A _H2With voltage V _aOffer address electrode A _2i-1And A _2iIn the situation of the complete white pattern of displayed map 9, as switch A _H1And A _H2During conducting, repeat pattern 1 to 4.

Because in the complete white pattern of Fig. 8, address electrode A _2i-1And A _2iSwitch A _L1And A _L2Therefore not conducting, release board capacitor C not _P1And C _P2In residual voltage.Yet, in mode 3, give plate capacitor C _P1And C _P2Charging, and in pattern 2, at plate capacitor C _P1And C _P2Do not discharge residual voltage after the discharge.Therefore, suppose that 100% energy is recovered and uses, then give capacitor C in the pattern 2 ₂In energy that fills and the mode 3 from capacitor C ₂The energy that discharges is substantially the same.In the situation of the complete white pattern of displayed map 8, because also carry out in pattern 1 electric current offered capacitor C ₂To give capacitor C ₂So the operation of charging is capacitor C ₂In the voltage Δ V1 that filled always greater than from capacitor C ₂The voltage Δ V2 that discharges.

At capacitor C ₂In the voltage Δ V1 that filled always greater than from capacitor C ₂In the situation of the voltage Δ V2 that discharges, when the process of repeat pattern 1 to 4, capacitor C ₂Voltage increase.As capacitor C ₂Voltage when increasing, in pattern 2, slave plate capacitor C _P1And C _p2 are discharged into capacitor C ₂Electric current reduce, to reduce slave plate capacitor C _P1And C _P2Discharge capacity.That is to say, when the pattern 1 to 4 that repeats as shown in figure 11, plate capacitor C _P1And C _P2Voltage V _P1And V _P2Decrease reduce.

In pattern 2, as continuous increase capacitor C ₂Voltage, to be substantially equal to voltage V _aThe time, because plate capacitor C _P1And C _P2Voltage V _P1And V _P2Corresponding to capacitor C ₂So the voltage at place is plate capacitor C _P1And C _P2Do not discharge.Because plate capacitor C in pattern 2 _P1And C _P2Voltage V _P1And V _P2Do not reduce, thus in mode 3 plate capacitor C _P1And C _P2Do not charge.In pattern 2 and 3, as capacitor C ₂The voltage at place reaches V _aThe time, significant electric current motion almost disappears, and like this, in the situation that shows complete white pattern, Power Recovery circuit 210 is not worked basically.

As mentioned above, change capacitor C when blocked operation by addressing circuit ₂Voltage level the time, set up operation according to the Power Recovery circuit of first example embodiment of the present invention.Capacitor C ₂Voltage by capacitor C ₂In charged and determine from the energy of its release.Because capacitor C ₂Rechargeable energy comprise the energy that provides by inductor by voltage source and the discharge energy of plate capacitor, and because capacitor C ₂Discharge energy comprise the rechargeable energy of plate capacitor, so when with equaling V _a/ 2 voltage (it is address voltage half) is given capacitor C ₂During charging, capacitor C ₂Rechargeable energy greater than its discharge energy.

In a situation of on/off pattern, discharged fully and dropped to ground wire voltage because be charged to the plate capacitor that equals address voltage, and the switch A by addressing circuit _LConducting and be charged to once more and equaled address voltage, so (it is capacitor C to the rechargeable energy of plate capacitor ₂Discharge energy) almost constant.In addition, when using voltage V _a/ 2 give capacitor C ₂During charging, because capacitor C ₂Rechargeable energy greater than its discharge energy, so capacitor C ₂The voltage at place increases, thus capacitor C ₂Rechargeable energy reduce.Therefore, when the operation above the repetition, reduce capacitor C ₂Rechargeable energy, to be substantially equal to capacitor C ₂Discharge energy, thereby carry out Power Recovery operation.

Because addressing circuit 220 ₁To 220 _mA lot of switchings change, so when from being connected to addressing circuit 220 ₁To 220 _mA plurality of plate capacitors in be provided at and discharged fully and drop to after the ground wire voltage, when being charged to a lot of plate capacitor that equals address voltage, use V _a/ 2 and V _aBetween voltage come to capacitor C ₂Charging, thus carry out the Power Recovery operation.

In the situation of complete white pattern, be connected to the switch A of the plate capacitor that is charged to address voltage _LNot conducting.As capacitor C ₂Rechargeable energy greater than its discharge energy, make capacitor C ₂The voltage at place surpasses V _a/ 2 o'clock, the voltage of the plate capacitor not resonance by inductor and plate capacitor discharged and drops to ground wire voltage.Because be connected to the switch A that is charged to the plate capacitor that equals address voltage _LNot conducting is so produce residual voltage.By this residual voltage, reduce the rechargeable energy and the discharge energy of plate capacitor in an identical manner, therefore, capacitor C ₂The voltage at place increases continuously.As capacitor C ₂When the voltage at place increased, the residual voltage of plate capacitor also increased, and did not almost have energy to be charged in the plate capacitor and also discharged in the slave plate capacitor, and almost do not have energy depleted in the Power Recovery circuit.

Except complete white pattern, for wherein only show on the whole screen a kind of pattern of color or wherein address voltage be applied to pattern on the address electrode of predetermined number continuously, seldom carry out Power Recovery operation described above.

In above-mentioned first example embodiment of the present invention, in the pattern of required power reclaimer operation, carry out the Power Recovery operation owing to a lot of switching variations of addressing circuit, and, because the less switching of addressing circuit changes and do not carry out the Power Recovery operation automatically in the pattern of required power reclaimer operation.

As example,, can suppose in the driving circuit shown in Fig. 4 that the whole plate electric capacity in some on/off pattern, line on/off pattern and the complete white pattern are respectively about 169nF, 217nF and 288nF for this purpose of description.For this plate electric capacity, if capacitor C ₁Electric capacity with 10 μ F, capacitor C ₂Electric capacity with 10 μ F, inductor L ₁Inductance with 0.1 μ H, inductor L ₂Inductance with 0.1 μ H, then address voltage V _aBe 60-65V.As the skilled person will recognize, just a characteristics of components in the embodiments of the invention and an example of Cycle Length above; Can use the parts with other characteristic and the cycle of different length.

In first example embodiment, be used to make capacitor C ₂The inductor L of discharge ₁Be used for to capacitor C ₂The inductor L of charging ₂Different.Yet, as shown in figure 13, can use identical inductor L.First end of inductor L is connected to addressing circuit 220 ₁To 220 _mSwitch A _HSecond end, and second end of inductor L is parallel to diode D ₁And D ₂Therefore, capacitor C ₂In the electric current that filled and from its electric current that comes inductor L that flows through.

Figure 14 shows the power consumption in the address driving circuit of first example embodiment according to the present invention.As shown in figure 14, in the pattern that a lot of switchings change such as having of an on/off pattern and line on/off pattern, be lower than the power consumption G1 of driving circuit according to the power consumption G3 of the address driving circuit of first example embodiment with Power Recovery circuit, and identical with the power consumption G2 of traditional Power Recovery circuit (open in United States Patent (USP) No. 4866349 and No. 5081400).In addition, such as the having in the pattern that less switching changes of complete white pattern, complete red pattern, complete green pattern and full blueprint case, be lower than the power consumption G2 of conventional power recovery circuit according to the power consumption G3 of the address driving circuit of first example embodiment.Yet, in having the pattern that less switching changes, being higher than the power consumption G1 of driving circuit with Power Recovery circuit according to the power consumption G3 of the address driving circuit of first example embodiment, this is because it carries out the Power Recovery operation in this pattern.

Below with reference to Figure 15 and 16 example embodiment lower than the power consumption of first example embodiment described.

Figure 15 shows the controller according to the plasma display panel device of the 3rd example embodiment of the present invention, and Figure 16 shows the power consumption according to the driving circuit of the 3rd example embodiment of the present invention.

Plasma display panel device according to the 3rd example embodiment of the present invention has controller 400, and they are different with the controller 400 according to the plasma display panel device of first embodiment.With reference to Figure 15, comprise that according to the controller 400 of the plasma display panel device of the 3rd example embodiment data processor 410, address power consume estimator 420 and address power reclaims determinant and address power recovery controller 440.

Data processor 410 converts the vision signal of input in each height field on/off data.Suppose that a frame (that is TV field) is divided into that to have value respectively be 8 sons that 1,2,4,8,16,32,64 and 128 weight is used as hold period length.Data processor 410 will (for example) 100 grey levels vision signal convert 8 bit data of " 00100110 " to.Position in " 00100110 " " 0 " and " 1 " correspond respectively to the logical and disconnected state of 8 son 1SF to 8SF in the discharge cell (point)." 0 " is illustrated in that discharge cell will not discharge (break) in the corresponding son, and discharge cell (point) will discharge (leading to) in the corresponding son field and " 1 " is illustrated in.

Address power consumes estimator 420 and estimates address power consumption in each height field according to the vision signal that is converted to the on/off data.By addressing circuit 220 ₁To 220 _mSwitching change to determine the address power consumption.When conducting of two neighboring discharge cells of column direction and another when turn-offing, switch to change and take place.Therefore, suc as formula 1 described, can estimate that address power consumes AP according to the summation of the difference between the on/off data of two neighboring discharge cells of column direction.

Formula 1

$\mathrm{AP}=\underset{i=1}{\overset{n-1}{\mathrm{\Σ}}}\underset{j=1}{\overset{m}{\mathrm{\Σ}}}\left(\right|R_{\mathrm{ij}}-R_{(i+1)j}|+|G_{\mathrm{ij}}-G_{(i+1)j}|+|B_{\mathrm{ij}}-B_{(i+1)j}\left|\right)$

Wherein, R _Ij, G _IjAnd B _IjBe respectively R (red), G (green) in the capable j of the i row and the on/off data of B (indigo plant) discharge cell.

Usually, because vision signal is imported continuously with the order of row, therefore address power consumes the line storage (not shown) that estimator 420 comprises the vision signal that is used for storing one row, so that poor between the on/off data of two neighboring discharge cells of calculated column direction.When input during for the on/off data of each height field of the vision signal of delegation, address power consumes estimator 420 these on/off data storage is arrived line storage, read the on/off data that move ahead earlier from line storage, and calculate poor between the on/off data of two neighboring discharge cells in each height field.Address power consumes estimator 420 and carries out this calculating for all discharge cells, and estimates that according to the summation of result of calculation address power consumes AP.In addition, address power consumes estimator 420 can carry out XOR (XOR) computing between the on/off data of two neighboring discharge cells in each height field, rather than calculates poor between the on/off data.

Address power reclaims determinant 430 and uses the address power consumption AP of through type 1 calculating to judge whether carry out the Power Recovery operation, and output indicates whether to carry out the control signal of Power Recovery operation.When address power consumption AP was higher than critical value, address power reclaimed the control signal that determinant 430 output indications should be carried out the Power Recovery operation, and when the power consumption AP subcritical value of address, the control signal that the output indication should not carried out the Power Recovery operation.

When the control signal indication should be carried out the Power Recovery operation, the Power Recovery circuit 210 that address power recovery controller 440 allows to describe in first or second example embodiment was worked.When control signal indication should not carried out the Power Recovery operation, address power recovery controller 440 prevented Power Recovery circuit 210 work described in first or second example embodiment.In order to stop the Power Recovery operation, address power recovery controller 440 is stopcock A always _rAnd A _fAnd actuating switch A _a, make voltage V _aBe applied to addressing circuit 220 ₁To 220 _mSwitch A _HFirst end on.Then, by actuating switch A only _H, addressing voltage V _aBe applied to address electrode A ₁To A _mOn.Therefore, removed as switch A _rOr A _fThe power consumption that produces by resonance during conducting.

In the 3rd example embodiment of the present invention, because in display pattern with less switching variation, the switch A of Power Recovery circuit 210 _rAnd A _fConducting always is so can remove from switch A _rAnd A _fThe handoff loss that causes of operation and as switch A _rOr A _fThe power consumption that causes by the resonance that is produced during conducting.Therefore, as shown in figure 16, in the pattern with less switching variation such as complete white pattern, complete red pattern, complete green pattern and full blueprint case, the power consumption of the 3rd example embodiment is lower than the power consumption of first example embodiment.

In the 3rd example embodiment of the present invention, whether the address power consumption is determined in conducting by two neighboring discharge cells along the direction that is listed as.Yet address power also is subjected to following the neighboring discharge cells influence of direction.During the neighboring discharge cells of the direction that follows when explanation, use description to the 4th example embodiment of the operation of power controlling recovery circuit 210.

As shown in Figures 1 to 3, because address electrode A ₁To A _mDirection along row is extended, so capacitive element is present in two adjacent address electrode A _iAnd A _I+1Between.Therefore, be applied to two neighbor address electrode A _iAnd A _I+1On the situation of voltage when identical in, power consumption is lower than and is being applied to two neighbor address electrode A _iAnd A _I+1On the asynchronous situation of voltage in power consumption.Therefore, the power consumption in the some on/off pattern shown in Fig. 6 is higher than the line on/off pattern shown in Fig. 7.

At length say, when the on/off state of the neighboring discharge cells of line direction not simultaneously, two neighbor address electrode A of line direction _iAnd A _I+1Between electric capacity increase.Then, because when following electric capacity that direction forms and increase, the total capacitance that is loaded on the Power Recovery circuit of address driving circuit increases, and is used for electric charge is injected the reactive power increase of electric capacity.Otherwise, when the on/off state of the neighboring discharge cells of line direction is identical, two neighbor address electrode A _iAnd A _I+1Between electric capacity reduce.In this case, the total capacitance that is loaded on the Power Recovery circuit reduces, and makes reactive power reduce.

In the 3rd example embodiment, because reactive power consumption is according to the on/off state of the neighboring discharge cells of line direction and difference, so the on/off state of the neighboring discharge cells by line direction is determined the operation of Power Recovery circuit.As shown in Equation 2, address power consumption AP is determined by the difference between the on/off data between the neighboring discharge cells of the poor and column direction between the on/off data between the neighboring discharge cells of line direction.In formula 2, suppose the direction that follows order reignition unit with R, G and B.

Formula 2

$\mathrm{AP}=\underset{i=1}{\overset{n-1}{\mathrm{\Σ}}}\underset{j=1}{\overset{m}{\mathrm{\Σ}}}\left(\right|R_{\mathrm{ij}}-R_{(i+1)j}|+|G_{\mathrm{ij}}-G_{(i+1)j}|+|B_{\mathrm{ij}}-R_{(i+1)j}\left|\right)$

$+\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\underset{j=1}{\overset{m}{\mathrm{\Σ}}}\left(\right|R_{\mathrm{ij}}-G_{\mathrm{ij}}|+|G_{\mathrm{ij}}-B_{\mathrm{ij}}|+|B_{\mathrm{ij}}-R_{i(j+1)}\left|\right)$

As mentioned above, in third and fourth example embodiment of the present invention, for having the pattern that less switching changes, the Power Recovery operation does not take place, and makes power consumption reduce.

In addition, according to the present invention,, carry out the Power Recovery operation, and in the pattern that the switching that does not have addressing circuit changes, prevent the Power Recovery operation automatically, thereby reduce power consumption for the pattern that a lot of switchings with addressing circuit change.Because use greater than half value of predetermined voltage to come to the external capacitor charging, so when applying address voltage, carry out zero voltage switching.

Although be considered to the most practical and described the present invention with embodiment example in conjunction with current, but be understood that, the invention is not restricted to the disclosed embodiments, but opposite, be intended to contain modification included in the spirit and scope of the appended claims and be equal to arrangement.

Claims (38)

1. plasma display panel device comprises:

The plate that comprises second electrode that second direction that a plurality of first electrodes that extend along first direction and a plurality of edge and first direction intersect is extended;

First driving circuit, it is applied to first voltages in sequence on first electrode;

Select circuit, it is couple to second electrode, is used for will being applied in from the selection of second electrode second electrode of second voltage;

Second driving circuit, it comprises that at least one has inductor that is couple to first end of selecting circuit and the capacitor that is couple to second end of this inductor, is used for second voltage is applied to by second electrode of selecting circuit to select; And

Controller, it judges the mode of operation of second driving circuit in response to vision signal,

Wherein, when mode of operation is first pattern, after giving the capacity load charging that forms by first electrode and selected second electrode by capacitor and inductor, second driving circuit is applied to second voltage on selected second electrode, and make the discharge of this capacity load by capacitor and inductor, thereby reduce the voltage of selected second electrode, and reduce capacity load discharge residual voltage afterwards by the operation of selecting circuit; And

When mode of operation was second pattern, second driving circuit was applied directly to second voltage on selected second electrode.

2. equipment as claimed in claim 1, wherein when at least one height field, the number of first discharge cell is during greater than predetermined value, controller judges that mode of operation is first pattern, and the on/off state of first discharge cell is with different adjacent to the on/off state of the discharge cell of first discharge cell along first direction.

3. equipment as claimed in claim 1, wherein when at least one height field, the number of the number of first discharge cell and second discharge cell and during greater than predetermined value, controller judges that mode of operation is first pattern, the on/off state of first discharge cell is different with the on/off state along the neighboring discharge cells of first direction, and the on/off state of second discharge cell is different with the on/off state along the neighboring discharge cells of second direction.

4. equipment as claimed in claim 1, wherein in first pattern, second driving circuit offered capacitor with electric current before making the capacity load discharge.

5. equipment as claimed in claim 4, the electric current that wherein offers capacitor are to provide from the voltage source that second voltage is provided.

6. equipment as claimed in claim 4, wherein in first pattern, second driving circuit is worked in the following order:

Period 1, during this cycle, come to charge to capacity load by the voltage that is filled in inductor and the capacitor;

Second round, during this cycle, the voltage source by second voltage is provided maintains second voltage basically with second electrode of selected capacity load;

Period 3, during this cycle, electric current is offered inductor and capacitor by the working voltage source; And

Period 4, during this cycle, make the capacity load discharge by using the voltage that is filled in inductor and the capacitor.

7. equipment as claimed in claim 4, wherein second driving circuit also comprises:

First switch and second switch, its coupled in parallel is between second end of inductor and the capacitor or first end of inductor and selecting between the circuit; And

The 3rd switch, it is coupled in the voltage source that second voltage is provided and selects between the circuit.

8. equipment as claimed in claim 7, wherein first switch, second switch and the 3rd switch are respectively the transistors that comprises body diode, and,

Second driving circuit also comprises first diode, and it is in the path that is formed by capacitor, first switch and inductor, form at the reverse direction of the body diode of first switch; And second diode, it is in the path that is formed by capacitor, second switch and inductor, form at the reverse direction of the body diode of second switch.

9. equipment as claimed in claim 8, wherein in first pattern, second driving circuit is worked in the following order:

Period 1, during this cycle, first switch conduction;

Second round, during this cycle, the 3rd switch conduction;

Period 3, during this cycle, second switch and the 3rd switch conduction; And

Period 4, during this cycle, the second switch conducting.

10. equipment as claimed in claim 7, wherein in second pattern, first switch conduction, and second switch and the 3rd switch turn-off.

11. equipment as claimed in claim 1, wherein at least one inductor comprises first inductor and second inductor, and

In first pattern, second driving circuit comes to the capacity load charging by first inductor, and makes the capacity load discharge by second inductor.

12. equipment as claimed in claim 1 is wherein identical with inductor on the path that capacity load is discharged to the inductor on the path of capacity load charging.

13. equipment as claimed in claim 1, wherein select circuit to comprise to be coupled in respectively a plurality of first switches between first end of second electrode and inductor, and be coupled in second electrode respectively and be used to provide a plurality of second switches between the voltage source of tertiary voltage.

14. equipment as claimed in claim 13 is wherein selected by second electrode of first switch that is couple to conducting the discharge cell that is switched on first electrode that has been applied in first voltage.

15. equipment as claimed in claim 13, wherein when when first voltage is applied on first electrode in turn, when selecting the continuous conducting of first switch of circuit, second driving circuit is with the second pattern work.

16. equipment as claimed in claim 1 wherein charges to capacitor with the voltage between half and second voltage of second voltage.

17. equipment as claimed in claim 16, wherein in first pattern, the voltage of capacitor is variable.

18. the driving method of a plasma display panel forms a plurality of first electrodes and second electrode on this plasma display board, form capacity load by first and second electrodes, this driving method comprises:

Judge mode of operation in each height field according to vision signal;

In first electrode, select to be applied in first electrode of first voltage, and second voltage be applied on non-selected first electrode,

Wherein when mode of operation was first pattern, this driving method also comprised:

By having first inductor of first end that is couple to first electrode, increase the voltage of selected first electrode;

By first voltage source of first voltage is provided, the voltage of selected first electrode is maintained first voltage basically;

When the voltage with selected first electrode maintains first voltage basically, electric current offered have second inductor that is couple to first end on first electrode; And

Reduce the voltage of selected first electrode by second inductor, and

When mode of operation was second pattern, this driving method also comprised by first voltage source first voltage is applied on selected first electrode.

19. driving method as claimed in claim 18, wherein form discharge cell by first electrode and second electrode, and when at least one height field, the number of first discharge cell is during greater than predetermined value, mode of operation is judged as first pattern, and the on/off state of first discharge cell is different adjacent to the on/off state of the discharge cell of first discharge cell with the direction of extending at first electrode.

20. driving method as claimed in claim 18, wherein discharge cell is formed by first electrode and second electrode, and when at least one height field, the number of the number of first discharge cell and second discharge cell and during greater than predetermined value, mode of operation is judged as first pattern, the on/off state of first discharge cell is different with the on/off state of the neighboring discharge cells of the direction of extending at first electrode, and the on/off state of second discharge cell is different with the on/off state of the neighboring discharge cells of the direction of extending at second discharge cell.

21. driving method as claimed in claim 18, wherein in first pattern, when increasing and reducing the voltage of first electrode, capacitor is coupled to second end of first inductor and second end of second inductor.

22. driving method as claimed in claim 21 is wherein in first pattern, when increasing the voltage of first electrode by first inductor, the capacitor discharge, and be provided for second inductor when electric current, and when reducing the voltage of first electrode by second inductor, the capacitor charging.

23. driving method as claimed in claim 22, wherein the energy that discharges from capacitor is less than the energy that is charged the capacitor.

24. driving method as claimed in claim 22 wherein is stored in voltage in the capacitor corresponding to the voltage between half and first voltage of first voltage.

25. driving method as claimed in claim 18, wherein first and second inductors are identical.

26. driving method as claimed in claim 18, the wherein first and second inductor differences.

27. driving method as claimed in claim 18, wherein tertiary voltage is applied on second electrode in turn;

In first pattern, when tertiary voltage being applied on second electrode, repeat following steps:, increase the voltage of selected first electrode by having first inductor of first end that is couple to first electrode at every turn; By first voltage source of first voltage is provided, the voltage of selected first electrode is maintained first voltage basically; When the voltage with selected first electrode maintains first voltage basically, electric current is offered second inductor that is couple to first electrode; And the voltage that reduces selected first electrode by second inductor; And,

Change the voltage of capacitor according to the combination of first electrode of first electrode of previous selection and current selection.

28. a plasma display panel device comprises:

The plate that comprises second electrode that second direction that a plurality of first electrodes that extend along first direction and a plurality of edge and first direction intersect is extended;

First driving circuit, it is applied to first voltages in sequence on first electrode;

Select circuit, it is couple to second electrode, is used for will being applied in the selection of second electrode second electrode of data; And

Second driving circuit, it comprises that at least one is couple to the capacitor of selecting the circuit inductance device and being couple to this inductor,

Wherein, second driving circuit electrically intersects between inductor and capacitor, and when in the discharge cell of predetermined number, the summation of the data difference between two adjacent discharge cells of second direction is applied to second voltage by on second electrode of selecting circuit to select during less than predetermined value; And

Second driving circuit is by using inductor and capacitor, make the capacity load charging and the discharge that form by second electrode of selecting circuit to select and first electrode, and when described summation during greater than predetermined value, after to the capacity load charging, second voltage is applied on selected second electrode.

29. equipment as claimed in claim 28 wherein reduces capacity load discharge residual voltage afterwards by the operation of selecting circuit; And

30. equipment as claimed in claim 29, wherein before making the capacity load discharge, second driving circuit offers capacitor with electric current from the voltage source that second voltage is provided by inductor.

31. equipment as claimed in claim 29 wherein is charged to energy in the capacitor and comprises the energy that discharges from capacity load and offer the energy of this capacitor by inductor from voltage source, and

The energy that discharges from this capacitor comprises the energy to the capacity load charging.

32. equipment as claimed in claim 28 is wherein asked summation in a son field.

33. a plasma display panel device comprises:

The plate that comprises the address electrode that second direction that a plurality of scan electrodes that extend along first direction and a plurality of edge and first direction intersect is extended;

First driving circuit, it is applied to first voltages in sequence on the scan electrode;

Select circuit, it is couple to address electrode, is used for will being applied in the address electrode selection address electrode of data;

Second driving circuit, it is couple to the address electrode by selecting circuit to select; And

Controller, it judges the mode of operation of second driving circuit in response to vision signal,

Wherein, second driving circuit comprises: at least one has the inductor of first end that is couple to address electrode; Be coupled in voltage source that address voltage is provided and first switch between the address electrode; Be couple to the capacitor of second end of inductor; And at least one is coupled between second end of inductor and the capacitor or the second switch between inductor and the selection circuit,

When mode of operation was first pattern, second driving circuit was operated the voltage that increases and reduce address electrode by the on/off of second switch, and the residual voltage of the operation by selecting circuit after the voltage of address electrode is reduced is reduced to predetermined voltage; And

When mode of operation was second pattern, second driving circuit electrically intersected between capacitor and inductor by turn-offing second switch.

34. equipment as claimed in claim 33, wherein when at least one height field, the number of first discharge cell is during greater than predetermined value, controller judges that mode of operation is first pattern, and the on/off state of first discharge cell is with different adjacent to the on/off state of the discharge cell of first discharge cell along first direction.

35. equipment as claimed in claim 33, wherein in first pattern, second driving circuit is reducing before the voltage of address electrode electric current to be offered capacitor by inductor.

36. equipment as claimed in claim 35, wherein in first pattern, second driving circuit is worked in the following order:

Period 1, during this cycle, the second switch conducting,

Second round, during this cycle, first switch conduction,

Period 3, during this cycle, first switch and second switch conducting, and

Period 4, during this cycle, the second switch conducting.

37. a plasma display panel device comprises:

The plate that comprises second electrode that second direction that a plurality of first electrodes that extend along first direction and a plurality of edge and first direction intersect is extended;

First driving circuit, it is applied to first voltages in sequence on first electrode;

Select circuit, it is couple to second electrode, is used for will being applied in the selection of second electrode second electrode of data; And

Second driving circuit, it comprises that at least one is couple to the capacitor of selecting the circuit inductance device and being couple to inductor,

Wherein, in first mode of operation, inductor and capacitor electrode gas phase are handed over, and in second mode of operation, the voltage of capacitor can change according to display pattern.

38. a plasma display panel device comprises:

The plate that comprises second electrode that second direction that a plurality of first electrodes that extend along first direction and a plurality of edge and first direction intersect is extended;

First driving circuit, it is applied to first voltages in sequence on first electrode;

Select circuit, it is couple to second electrode, is used for will being applied in the selection of second electrode second electrode of data; And

Second driving circuit, it comprises that at least one is couple to the capacitor of selecting the circuit inductance device and being couple to inductor,

Wherein in first mode of operation, do not produce the resonance between inductor and the capacitor; And

In second pattern, produce the resonance between inductor and the capacitor, and the voltage of capacitor can change according to display pattern.

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